Hi Max.
Firstly, congrats on your new scope and don't believe the myth about it bringing on the rainclouds!
1. The finderscope should be adjustable. The front lens cell is threaded to the tube and is held there by a locking ring behind the lens cell. Gently undo the locking ring and then turn the lens cell either in or out to focus. Try it on a bright star.
2. If your 2x barlow is of the long tube type, it would not allow the focuser to do it's job. I use a short tube barlow with no problems.
3. Hmmmmm. Stray light source entering/relfecting off the tube/focuser, skyglow.
4. I had one of these and it did the same thing. Just enjoy the view of the inner half of the image.
Cheers!
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